Hi. M14's are Class 3 firearms, Stateside. You have to live in a State that allows Class 3 ownership and follow U.S. Federal rules/regs(the $200 tax every time a Class 3 changes hands, for example). Some States require the local PD's permission too. Totally up to the Chief of Police/Sherrif despite what the State law may say.
Our bunch got the 'Once an MG, always an MG' nonsense from the ATF. Stateside, semi-auto'd M14 receivers are evil(they've been confiscated and chopped in the past), as are Chinese made M305's, Polytechs, et al. Clinton banned the importation of inexpensive Chinese made battle rifle copies years ago.
An M1A and its copies is a commercial sporting rifle, just like it is here. Suspect that they're getting difficult to find with King Obama's new plans though.